Paper feed and cut-off.



W. F. HARBREGHT. PAPER FEED AND GUT-OFF. APPLICATION FILED MAR. 11.1911.

I 1,039,12, Patented Sept. 24, 1912.

'2 mwwdx wwaw W UNITED STATES PATENT orr on.

WILLIAM F. HARBRECHT, SANDUSKY, OHIO, ASSIGNOR TO HINDE 8t DAUCH PAPERCOMPANY, OF SAN'DUSKY, OHIO, A CORPORATION OF OHIO.

PAPER FEED AND CUT-OFF.

v Specification of Letters Patent.

Patented Sept. 24, 1912.

To all whom it may concern:

Be it known that I, WILLIAM F. HAR- nnncrrr, a citizen-of the UnitedStates of America, residing at Sandusky, in the county of Erie and Stateof Ohio, have invented certain new and useful Improvements in PaperFeeds and Out-Offs, of which the following is a specification, referencebeing had therein tothe accompanying drawings.

The invention relates more particularly to the manufacture of paperboard where the material is delivered from the machine at a constant anduniform feed.

It is the object of the invention to provide means for cutting ofi thestrip into sections, without interfering with the continuous movement,and further to vary the lengths of the sections thus cut.

To this end the invention consists in the construction of .a rotarycutter and the means for changing its timing, while maintaining the samespeed of movement during the cutting operation.

In the drawings :Figure 1 is a diagram-.

matic perspective view of machine. Fig. 2 is a sectional elevation ofthe cutter. Fig. 3 is a cross section through the gear.

A is a strip of paper or paper board which is continually fed from theforming machine (not shown) at a uniform speed. The cut-ofi' for thisstrip comprises a pair of rotary cooperating cutter members B and C.These as shown consist of rotary shafts D and E above and below theplane of feed.

Arms F project from said shafts and bars G are at the outer ends of saidarms. One of the bars G carries a clamp for the knife bar H, while theother bar is provlded with a cooperating shearing edge. The shafts D andE are rotated at the same speed but in opposite directions, byintermeshing gear wheels I-and J at one end thereof. Thus in operationthe knife bar and the c o6peratmg shearing edge will operate once 1neach cycle to sever the paper strip A fed therebetween.

For driving the feed mechanism and the cut-off mechanism in proper tunedrelat on, mechanism is provided mcludmg variable speed transmission, theconstruction being as follows: K is a motor or drive shaft from whichthe power is derived. L is a sprocket and chain connection from theshaft K to one of the rollers N which deliver the paper strip, thecooperating rollers being driven at the same speed through intermeshinggears (not shown). N- is a shaft parallel to the shaft K and driventherefrom at different speeds through the medium of a variable speedtransmission indicated at O. The specific construction of this variablespeed transmission is not essential to my invention and I have thereforeomitted,

showing the same in detail. From the shaft N power is transmitted to theshafts D and E through suitable transmission train which as showncomprises the belt P the step down train of gears Q and the intermeshingelliptical gears R. The purpose of the elliptic gears is to transmitrotary motion to the shafts D and E varying in speed at different pointsin the cycle but uniform .in suecessive cycles. The amount ofvariationin the speed produced by these elliptical gears is equal to the maximumamount of variation in speed which may be obtained by adjustment of thevariable speed transmission 0. The elliptical gears are also adjustable,rotatable with. respect to the shafts on which they are mounted, and thearrangement is such that by properly adjust-- ing these gears variationsin the speed produced by adjustment of the variable speed transmission 0may be compensated for, with the result that the speed of movement ofthe cut-off at the point of operation in the cycle may be maintainedconstant In detail construction each of the gears R is loosely sleevedupon its shaft and is arranged adjacent to the head S keyed or otherwisefixedly secured to the shaft. This head S is provided with a concentricunder cut, slot T in the face adjacentto the gear and headed bolts U,engaging those slots passing through apertures in the gear and whentightened will clamp said gear to the head. The gears R are preferablylinked together by a rod M which connects the face of the ellipsesopposite those in alinement with the shafts. This link will maintain thegears constantly in mesh during the cycle.

With the construction described in operation the continual feed stripmay be severed into sections of any desired lengths within the range ofadjustment of the machine. To make adjustment the variable speedtransmision O is first adjusted to change the speed of the transmissionfrom the shaft N to the shafts D and E; this will alter the timeinterval between successive cuts and as the speed of feed is uniform thelengths of the sections will be correspondingly altered. If however, nofurther adjustment were made, the speed of travel of the knife at thetime of cut-off would not correspond tothat of-the paperstrip with theinevitable result that the strip would be torn. To adjust the speed ofthe knife to correspend tothat of the strip while in contact therewith,the bolts U are loosened and the gears R are rotatably adjusted upontheir shafts to theproper point, which may be indicated bygraduations'on the heads or any other suitable means. .The bolts arethen tightened to'secure the gears in this a relation and in operationthe speed of the though the knife will be accelerated or retarded toc0rrespond with the speed of the strip, :11- time of the cycle will beunchanged.-

What I claim as my invention is:

l. The combination witli a strip feeding mechanism having a constant anduniform feed, of a rotary cut-off, a mechanism connecting said cut-offand said feed mechanism including a variable speed transnnssion, meansfor producing variable speeds speed transmission, a pair of intermeshing' elliptical gears having their cycles, coincident with thatof the cut-off, and means for adjusting said gears to compensate foradjustment in said transmission and tomaintain uniform speed ofoperation of the cutoif.

Intestimony whereof I afiix signature in presence of two witnesses.

WILLIAM F. HARBRECHT. Witnesses: p

SIDNEY FROHMAN, Cues. N.

